Portable information terminal equipped with camera

ABSTRACT

The information terminal body may be designed to foldably pivot a pair of flat cases each having a display unit through a hinge which is equipped with a photographing optical system for the camera function unit of which optical axis of lens is perpendicular to an axial center of the hinge. The display units display information from communication channels and images taken in by the camera. The cases may have the display units such that the display units face outside in a folded state. At least one of the two display units may be a finder for photographers, while the other may be a finder for the subject persons. The terminal is equipped with a shutter button and a terminal operation button. The terminal operation button works also as a shutter button. The information terminal is also equipped with a viewfinder for the camera lens system.

CROSS-REFERENCE TO RELATED PATENT APPLICATIONS

This application is a division of application Ser. No. 09/733,033, filedDec. 11, 2000, now pending, and based on Japanese Patent ApplicationsNos. 11-367810, 11-367811, and 11-367812, all filed Dec. 24, 1999 byMasaaki Nishino, Masakatsu Takizawa, Norihisa Mitsuyu, Shuji Yamaguchiand Satoshi Machida. This application claims only subject matterdisclosed in the parent application and therefore presents no newmatter.

BACKGROUND OF THE INVENTION

1. Technical Field of the Invention

The present invention relates to a portable information terminalequipped with camera which is applied to a portable television telephoneand other general purposes.

2. Description of the Prior Art

Conventional portable information terminal with camera of this type isprovided with a camera function unit which is arranged on an informationterminal body, and a display unit is used as a finder in a photographingoptical system of the camera function unit. In this manner, when theportable information terminal is equipped with the camera and used as adigital camera, it is desired that the portable information terminal hasoperability equal to that of a normal camera and consumes less electricpower.

Further, in a portable information terminal with camera of this type, aninformation terminal body is equipped with a camera function unit, and ashutter button arranged in a photographing optical system of the camerafunction unit is arranged on the information terminal body. In thismanner, when the portable information terminal is equipped with thecamera, high operability equal to that of a normal camera and theoperability of the camera when the portable information terminal is usedas a portable information terminal are desirably compatible. In general,in order to secure the operability of the camera, it may be effectivethat the position of the shutter is arranged at a shoulder portion of acase.

Furthermore, as a portable information terminal with camera of thistype, for example, devices disclosed in JP 8-22343 (1996) and JP11-69214 (1999) are known. In particular, in the device disclosed in JP11-69214 (1999), an information terminal is equipped with a camerafunction unit, and the information terminal body is designed to foldablypivot a pair of flat cases each having a display unit through a hingeportion, and the hinge portion has a photographing optical system of thecamera function unit, having a lens opening in a direction perpendicularto the axial center of the hinge portion. In this case, when theportable information terminal is equipped with the camera, thephotographing optical system of the camera must be attached to an end ofthe device body for the sake of a screen arrangement. For this reason,the hinge portion for folding the cases of the device is designed toform a lens opening for the optical system. In addition, since the lensopening can be headed in a free direction ranged to some extent, thecases can be switched from a folded state to open states of severalsteps, and the usage of the portable information terminal is designed invarious modes.

However, a power for screen display must be switched on to performphotographing while the display unit of the portable informationterminal is used as a finder. For this reason, a power consumptionincreases, and the portable information terminal can not be used formany hours. In addition, when a subject is photographed without usingdisplay finder, the photographing cannot be performed at a good cameraangle.

Further, when the portable information terminal is operated as aportable information terminal, and when a shutter is arranged at theshoulder portion of the case, every camera photographing, the devicemust be changed in holding state such that the shutter operation can beeasily performed, and a finger placed on the terminal operation buttonmust be moved to the position of the shutter arranged at the shoulder ofthe case. This action is a considerable disadvantage to operability. Inaddition, when the display screen is used as a vertically long screen ora horizontally long screen, if a shutter release button is arranged at aconvenient position, the operability is improved. Therefore, on theoperations obtained when the portable information terminal is used as acamera and a portable information terminal, the shutter must be alwayslocated at a proper position where the shutter does not degrade theoperability. However, the increase in the number of shutter releasebuttons must be avoided because the cost increases by increasing thenumber of parts and because the number of times of action that a userchanges her/his finger position cannot be reduced by increasing thenumber of shutter release buttons.

Furthermore, when this portable information terminal equipped withcamera is used in video recording, the display unit (liquid-crystaldisplay unit) display, for a photographer, a subject image by the lens.Therefore, the subject person can not know the present camera angle.This is because the displayed image cannot be seen from the subjectside.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a portable informationterminal with camera which is equipped with a viewfinder correspondingto a photographing optical system of a camera function unitindependently of a display unit, used as a viewfinder, for aninformation terminal when the portable information terminal is used in aphotographing mode of a camera, which does not degrade the operabilityof the camera, which suppresses a power consumption, and which can beused for many hours.

Another object of the present invention is to provide a portableinformation terminal with camera which can always acquire proper andcomfortable operability of a camera without increasing the number ofparts and complication of structure.

Still another object of the present invention is to provide a portableinformation terminal with camera including an information terminal bodyhaving display units arranged in a pair of cases folded through a hingeportion, wherein the portable information terminal is designed such thatphotographing can be performed while an image is also checked from asubject side by effectively using the two display units.

There is provided a portable information terminal with camera in whichan information terminal body is equipped with a camera function unit,and a display unit of the information terminal is used as a viewfinderin a photographing optical system of the camera function unit,characterized in that the information terminal body is equipped with aviewfinder for the photographing optical system such that the viewfinderis adjusted to a direction of an optical lens of the photographingoptical system. The viewfinder may be arranged in the informationterminal body such that the viewfinder can be retracted in theinformation terminal body. The information terminal body may be designedto foldably pivot a pair of flat cases at least one of which has adisplay unit through a hinge portion, and the hinge portion ispreferably equipped with the photographing optical system of the camerafunction unit and the viewfinder corresponding to the photographingoptical system

Further, there is provided a portable information terminal with camerain which an information terminal body is equipped with a camera functionunit, and an operation button for a shutter arranged in thephotographing optical system is arranged on the information terminalbody, characterized in that the same function as that of the operationbutton for the shutter is set in one function operation of a terminaloperation button arranged on the information terminal body. Theinformation terminal body may be designed to foldably pivot a pair offlat cases at least one of which has a display unit through a hingeportion, and it is practically preferable that the hinge portion isequipped with the photographing optical system of the camera functionunit. It is effective that the terminal operation button is a scrollbutton related to the display unit of the information terminal body, itis effective that the scroll button has a vertically pressing function,and the function is caused to correspond to the function of theoperation button for the shutter, and it is effective that the terminaloperation button causes one function operation to correspond to thefunction of the operation button for the shutter by function modeswitching on the information terminal body side.

Furthermore, there is provided a portable information terminal withcamera in which an information terminal body is equipped with a camerafunction unit, the information terminal body is designed to foldablypivot a pair of flat cases each having a display unit through a hingeportion, and the hinge portion is equipped with a photographing opticalsystem for the camera function unit having a lens opening in a directionperpendicular to an axial center of the hinge portion, characterized inthat the cases have the display units such that the display units faceoutside in a folded state. The hinge portion may have a structure inwhich the cases are pivoted by two parallel shafts with respect to ahousing equipped with the photographing optical system, the displayunits are designed to select two states such that the display units faceinside of the information terminal body in a folded state and faceoutside in a developed state, and the display units can be selected andswitched with respect to a normal image such that one of the displayunits facing the subject side displays an inverted image through imageinversion means to display the horizontal inverted image of aphotographed image. The display units arranged in the cases may have usemodes which can be switched such that the cases are opposite to eachother in the folded state of the cases and face the same side when thedisplay units are developed about the hinge portion at 180°, and ahousing equipped with the photographing optical system for the camerafunction unit is pivotally supported by the two parallel shafts, isrotated at 360° through the cases such that the display units can belocated inside or outside the information terminal in a folded state,and can be developed such that the display units can be located on thesame side in the middle of the rotation. The information terminal bodyis equipped with a camera function unit, the information terminal bodyhas two display units and is equipped with a photographing opticalsystem, having a lens opening, for the camera function unit, and one ofthe display units is designed to be used as a viewfinder of the camera.

According to the present invention a viewfinder which is arranged in aconventional camera is arranged in an information terminal body, asubject can be correctly captured even though the display unit of theinformation terminal is not used as a viewfinder. Since the display unitis not powered on, it is advantageous that a power consumption can bereduced.

Further, according to the present invention, a shutter release button islocated at a position similar to the position of a shutter releasebutton of a conventional camera, operability equal to that of aconventional camera can be realized even in the portable informationterminal, and camera shake in photographing or difficulty in performingthe operation can be canceled. In addition, even though a shutteroperation function is added to the terminal operation button (forexample, posture without any excessive actions such as a change inholding state of the device and a motion or change in the positions offingers.

Furthermore, according to the present invention, an image displayed on adisplay unit can also be checked by a subject person, when a camerafunction is operated. Images can be photographed on the basis of thedemands from the subject person.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a rear view of a first example of the first embodiment.Viewfinder 4 may be retracted, when display unit is used as a finder.

FIG. 1B is a front view of the first example of the first embodiment.Viewfinder 4 is extracted, when display unit 5 is not used as a finder.

FIG. 2A is a front view of a second example of the first embodiment.Viewfinder 4 is extracted, when display unit is not used as a finder.

FIG. 2B is a front view during unfolding the apparatus of the secondexample of the first embodiment.

FIG. 2C is a front view of the second example of the first embodiment.Viewfinder 4 is retracted, when display unit 1 b on flat case 1 x isused as a finder.

FIG. 3A is a front view of a third example of the first embodiment.Viewfinder 4 is fixed.

FIG. 3B is a front view during unfolding of the third example of thefirst embodiment.

FIG. 4 is a block diagram showing the configuration of the firstembodiment.

FIG. 5A is an illustration how to take a picture, by using a viewfinder4 and a shutter 3.

FIG. 5B is an illustration how to take a picture, by using a displayunit 5 and a scroll button 6 as a shutter.

FIG. 6 is a rear view of a first example of the second embodiment.Display unit 1 b is used as a finder, while scroll button 6 alsofunctions as a shutter button.

FIG. 7 is a front view schematic perspective view showing a secondexample of the second embodiment. Shutter button 3 is placed asconventional optical cameras.

FIG. 8 is an unfolded view of the second example as shown in FIG. 7.

FIG. 9 is a block diagram showing the configuration of the secondembodiment.

FIG. 10A is a front view of a first example of the third embodiment.Display unit 1 c is a finder for a subject person.

FIG. 10B is an unfolded view of the first example as shown in FIG. 10A.

FIG. 11A is a rear view of a second example of the third embodiment.Shutter button 3 is placed as conventional optical cameras.

FIG. 11B is an unfolded view of the second example as shown in FIG. 11A.

FIG. 11C is a front view of the second example of the third embodiment.Display unit Ic is a finder for a subject person.

FIG. 12 is a block diagram showing the configuration of the thirdembodiment.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment

In a first example of the first embodiment as shown in FIG. 1A, theinformation terminal body 1 is equipped with a camera function unit (notshown), and an operation button 3 for a shutter arranged in aphotographing optical system 2 (optical lens system, electric eyephotocell or the like) is arranged on a shoulder portion 1 a (upperside) of a case of the information terminal body 1.

In particular, according to the present invention, a viewfinder 4 isarranged in the shoulder portion 1 a in alignment with the operationbutton 3 to cause a user to peek in, for example, a direct image from anoptical path of the optical system 2 such that the viewfinder can beretracted in the information terminal body 1. In FIG. 1A, referencenumeral 5 denotes a display unit (liquid crystal screen) arranged on onesurface of the information terminal body 1, and a terminal operationbutton 6 serving as a scroll button related to the display unit 5 isarranged beside the display unit 5.

The terminal operation button 6 is designed such that two operationfunctions are added by pressing the terminal operation button 6 in twosteps independently of a tilting operation for a scroll operation (to bedescribed later).

The information terminal body 1 shown in FIGS. 2A, 2B and 2C is designedto foldably pivot a pair of flat cases 1X and 1Y at least one (two, inthis example) of which has display units 1 b and 1 c through a hingeportion 1Z. A housing 7 equipped with the photographing optical system 2(lens opening is shown outside) of the camera function unit is arrangedon the hinge portion 1Z such that the housing 7 can be pivoted about therotation center of the hinge portion 1Z.

Here, the viewfinder 4 is arranged in an optical system storage unit(large-diameter portion which can be rotated about the shaft) of thehinge portion 1Z such that the viewfinder can be retracted in theoptical system storage unit.

In a third example as shown in FIGS. 3A and 3B, the viewfinder 4 isdirectly and fixedly arranged in the optical system storage unit.

Here, the positions of the shutter button 3 for the shutter and theviewfinder 4 are set at the positions shown in FIG. 2 or 3. However, theshutter button 3 and the viewfinder 4 may be located any positions wherethe shutter button 3 and the viewfinder 4 can be easily operated asbuttons of a camera.

In these examples, each of the shutter button 3 (shutter release button)and the scroll button 6 has a button switch structure of a two-steppressing type. When each button is pressed in the first step, like aconventional camera, the camera function unit is activated to set thedevice in a photographing preparation stage. When the button is pressedin the second step, the shutter is released.

In this case, when the shutter button 3 or the scroll button 6 ispressed down by one step, as shown in FIG. 4, a control circuit 11controls a lens drive unit 12 to adjust a focal point and an exposure ofthe photographing optical system 2 (optical lens system), and thecontrol circuit 11 controls an image signal processing circuit 13 and aphotographing circuit 14 to perform such an adjustment that a properimage can be photographed and completes preparation for photographing.

When the shutter button 3 or the scroll button 6 is pressed down by twosteps, the signal is input to the control circuit 11, and the shutter(not shown) of the photographing optical system 2 is released. Imageinformation focused by the photographing circuit 14 is converted intodigital image data by the image signal processing circuit 13 to bestored in a memory 15.

In this case, the control circuit 11 is connected to a main circuit ofthe portable information terminal. Digital image data stored in thememory 15 is transferred to the main circuit through the control circuit11. In this case, an image may be displayed on the display unit 1 b.

In the portable information terminals having the configurations shown inFIGS. 2 and 3, the following configuration may be used. That is, forexample, the case 1Y is developed at 360° with respect to the case 1X,image display is performed on the display unit 1 b as a viewfinder. Thedisplay unit 1 c is caused to face a subject side, and the same screendisplay is performed on the display unit 1 c, so that the image(so-called camera angle) as a subject can be watched from the subjectside.

In this configuration, when photographing is performed with a verticallylong or horizontally long screen as a camera by changing the holdingstate of the terminal body 1 (see FIGS. 5A and 5B), it is advantageousthat the shutter button 3 serving as a shutter release button and thescroll button 6 are easily selectively operated even if a user peeks inthe viewfinder 4 or even if the user watches the display unit 5 (or 1c).

In this example, the scroll button 6 is designed to be used in not onlya shutter operation function (press down) but also a screen scrolloperation or a menu selection operation which is an original function.For this reason, the scroll button 6 is connected to the control circuit11 and also connected to the main circuit of the portable informationterminal. In the portable information terminal, in order to make itpossible to also set the function when the scroll button 4 is verticallypressed down in a function except for the shutter operation function, ascroll button control circuit 16 which can perform an operation such asa function mode switching operation may be arranged. However, when thefunction when the scroll button is vertically pressed down is set inonly the shutter operation function, the scroll button control circuit16 may be omitted.

The portable information terminal can achieve the function of atelevision telephone or the like which is the original function. Forexample, in the case of the configuration shown in FIGS. 2 and 3, in thefolded state shown in FIG. 2A or 3A, only a reception state (which canalso be actively turned off by the switching operation) and a camerafunction are set. The function of the information terminal is set suchthat a reception signal of the information terminal can be notified bygenerating a predetermined sound, and the shutter operation of thecamera function unit is performed by a pressing operation of the shutterbutton 3.

In this case, a user arbitrary selects whether the display unit 1 b isused as a viewfinder or the viewfinder 4 is directly used. A switchingoperation for this selection may be performed by a switch (not shown)arranged on the terminal body. When the viewfinder 4 is directly used,the screen display (output display as the function of the viewfinder) ofthe display unit 1 b is stopped, unnecessary power is prevented frombeing consumed.

As shown in FIGS. 2B and 3B, in a developed state of the cases 1X and 1Y(for example, a mode turnover switch function for converting the modefrom a camera function mode to an information terminal function mode isachieved), functions (switching function to a transmission/receptionstate, function for turning on the display units 1 b and 1 c, and thelike) of the information terminal are set.

Here, a function switch such as a keyboard display is displayed on apart of the display unit 1 b, while a call is made by the scroll button6.

In this state, the transmission and reception of sound can be realized,and the camera function unit is operated to continuously orintermittently photograph the image of a user herself/himself throughthe photographing optical system 2. For example, an image is displayedon a part of the display unit 1 b, and an image signal is digitized andthen it is transmitted to a person on the opposite end of line. An imageof the person on the opposite end of line is also displayed on thedisplay unit 1 c.

On the demand of the called person or calling person, the camerafunction is achieved by using the photographing optical system 2, andthe image can also be immediately transmitted to the other end. Such amode switching operation may be performed by a function switch displayedon a part of the display unit 1 b or the like.

In the portable information terminal with camera according to thepresent invention, when the camera function is mainly operated, even ifthe display unit 1 b of the portable information terminal is powered onto be used as a viewfinder, the viewfinder 4 which is independentlyarranged can be used in correspondence with the photographing opticalsystem 2 of the camera function unit. For this reason, a power forpowering the display unit 1 b can be prevented from being consumed.

In these examples, the vertical press switch function set in the scrollbutton 6 can also be used in a function except for the shutter operationbutton (multiple function) to the taste of a user.

Second Embodiment

The outlines of two examples of the second embodiment are shown in FIGS.6, 7, and 8. In the first example as shown in FIG. 6, an informationterminal body 1 is equipped with a camera function unit (not shown), anshutter operation button 3 for a shutter arranged in a photographingoptical system 2 (optical lens system, electric eye photocell, and thelike) is arranged on a shoulder portion 1 a (located on a surfaceperpendicular to a surface having a display unit to be described later)of a case of the information terminal body 1.

In particular, the same function as that of the shutter operation button3 for the shutter is set in one function operation of a terminaloperation button 6 arranged on the information terminal body 1, so thatthe terminal operation button 6 and the shutter operation button 3 canbe used by switching. In this example, the terminal operation button 6is a scroll button related to the display unit 1 b of the informationterminal body 1. This scroll button has not only a scroll functionobtained by a normal tilting operation but also a vertical pressingfunction, and the function is caused to correspond to the function ofthe shutter operation button 3 for the shutter (the terminal operationbutton 6 and the shutter operation button 3 have the same functions).

The second example of information terminal body 1 as shown in FIGS. 7and 8 is designed to foldably pivot a pair of flat cases 1Y and 1Y atleast one (two, in this example) of which has display units 1 c and 1 dthrough a hinge portion 1Z. The hinge portion 1Z is equipped with thephotographing optical system 2 of the camera function unit. Thecharacteristic feature of the present invention is the same as that ofthe configuration shown in FIG. 6.

Here, the positions of the shutter operation button 3 for the shutterand the scroll button 6 are set at the positions shown in FIG. 8.

However, the shutter operation button 3 and the scroll button 4 may belocated at any positions. The shutter operation button 3 may be locatedat a position where the information terminal is easily operated as acamera, and the scroll button 6 may be located at a position where thescroll button is is easily operated as the shutter release button of thecamera and is easily operated as the operation button of the portableinformation terminal.

Each of the shutter operation button 3 (shutter release button) and thescroll button 6 has a button switch structure of a two-step pressingtype. As for the former, when each button is pressed in the first step,like a conventional camera, the camera function unit is activated to setthe device in a photographing preparation stage. When the button ispressed in the second step, the shutter is released.

In this case, when the shutter operation button 3 or the scroll button 6is pressed down by one step, as shown in FIG. 9, a control circuit 11comprising of a CPU and the like controls a lens drive unit 12 to adjusta focal point and an exposure of the photographing optical system 2(optical lens system), and the control circuit 11 controls an imagesignal processing circuit 13 and a image-pickup circuit 14 to performsuch an adjustment that a proper image can be photographed and completespreparation for photographing.

When the shutter operation button 3 or the scroll button 6 is presseddown by two steps, the signal is input to the control circuit 11, andthe shutter (not shown) of the photographing optical system 2 isreleased. Image information focused by the image-pickup circuit 14 isconverted into digital image data by the image signal processing circuit13 to be stored in a memory 15.

n this case, the control circuit 11 is connected to a main circuit ofthe portable information terminal. Digital image data stored in thememory 15 is transferred to the main circuit through the control circuit11. In this case, an image may be displayed on the display unit 1 b.

In the portable information terminals having the configurations shown inFIGS. 7 and 8, the following configuration may be used. That is, forexample, the case 1Y is developed at 360° with respect to the case 1X,image display is performed on the display unit 1 b as a viewfinder. Thedisplay unit 1 c is caused to face a subject side, and the same screendisplay is performed on the display unit 1 c, so that the image(so-called camera angle) as a subject can also be watched from thesubject (person to be photographed) side. In this manner, the image ofthe person to be photographed can be checked.

In this example, the scroll button 6 is designed to be used in not onlya shutter operation function (press down) but also a screen scrolloperation or a menu selection operation which is an original function.For this reason, the scroll button 6 is connected to the control circuit11 and also connected to the main circuit of the portable informationterminal. In the portable information terminal, in order to make itpossible to also set the function when the scroll button 4 is verticallypressed down in a function except for the shutter operation function, ascroll button control circuit 16 which can perform an operation such asa function mode switching operation may be arranged. However, when thefunction when the scroll button is vertically pressed down is set inonly the shutter operation function, the scroll button control circuit16 may be omitted.

In this example, the scroll button 6 is designed to be used in not onlya shutter operation function (press down) but also a screen scrolloperation or a menu selection operation which is an original function.For this reason, the scroll button 6 is connected to the control circuit11 and also connected to the main circuit of the portable informationterminal. In the portable information terminal, in order to make itpossible to also set the function when the scroll button 6 is verticallypressed down in a function except for the shutter operation function, ascroll button control circuit 16 which can perform an operation such asa function mode switching operation may be arranged. However, when thefunction when the scroll button is vertically pressed down is set inonly the shutter operation function, the scroll button control circuit16 may be omitted.

The portable information terminal can achieve the function of atelevision telephone or the like which is the original function. Forexample, in the case of the configuration shown in FIGS. 7 and 8, in thefolded state shown in FIG. 7, only a reception state (which can also beactively turned off by the switching operation) and a camera functionare set. The function of the information terminal is set such that areception signal can be notified by generating a predetermined sound,and the shutter operation of the camera function unit is performed by apressing operation of the operation button 3.

As shown in FIG. 8, in a developed state of the cases 1X and 1Y (forexample, a mode turnover switch function for converting the mode from acamera function mode to an information terminal function mode isachieved), functions (switching function to a transmission/receptionstate, function for turning on the display units 1 b and 1 c, and thelike) of the information terminal are set.

Here, for example, a function switch such as a keyboard display isdisplayed on a part of the display unit 1 b, while a call is made byusing scroll button.

In this state, the transmission and reception of sound can be realized,and the camera function unit is operated to continuously orintermittently photograph the image of a user herself/himself throughthe photographing optical system 2. For example, an image is displayedon a part of the display unit 1 b, and an image signal is digitized andthen transmitted to a person on the other end of line. An image of theperson on the other end of line can also be displayed on the displayunit 1 c.

On the demand of a calling person or a called person, the photographingoptical system 2 is activated, and the image can also be immediatelytransmitted to the other end. Such a mode switching operation may beperformed by a function switch serving as a touch sensor displayed on apart of the display unit 1 b or the like.

In the portable information terminal with camera according to thepresent invention, even though the camera function is mainly operated,or when the original function of the portable information terminal ismainly used, an advantage that a button (for example, scroll button)operated by a user is used as an operation button for a shutteroperation can be achieved. In addition, the vertically pressingswitching function set in the scroll button can also be used in afunction except for the shutter operation button (multiple function) tothe taste of a user.

In many conventional portable information terminals with camera, shutterrelease buttons are independent of other buttons. Therefore, when a userwants to photograph a subject with the camera while a scroll button isbeing operated, the user changes the holding state of the device body orthe user must separate her/his finger from the scroll button and movethe finger to the operation button for the shutter. Furthermore, when aphotographing operation is performed with a vertically long screen or ahorizontally long screen, the same actions as described above must beperformed to change the position of the camera.

Although a shutter operation function is added to the scroll buttonserving as a terminal operation button, a shutter operation can also berealized without using the scroll button. The shutter operation can alsobe achieved by operating a plurality of buttons 5 as shown in FIG. 6.

Third Embodiment FIRST EXAMPLE

In this example, the information terminal body 1 is designed such that,as shown in FIGS. 10A, 10B, a pair of flat cases 1X and 1Y havingdisplay units 1 b and 1 c are foldably pivoted through a hinge portion1Z, and the hinge portion 1Z is equipped with a photographing opticalsystem 2 (lens opening is shown outside) for the camera function unit.One case 1X is equipped with a terminal operation button 6 as a scrollbutton for a screen of the display unit 1 b, and the terminal operationbutton 6 is aligned to another terminal operation button 5. The terminaloperation button 5 is designed (to be described later) such that notonly a tilting operation for a scroll operation in a normal state butalso two operation functions obtained by pressing the button in twosteps.

In particular, here, the cases 1X and 1Y have the display units on theoutside surfaces such that the display units 1 b and 1 c face outside(the display units 1 b and 1 c are back to back on the opposite side) ina folded state. The hinge portion 1Z is designed to pivot a hingeportion 1 d arranged on the case 1X and a hinge portion 1 e arranged onthe case 1Y with respect to the axial center (not shown) of a housingwhich accommodates the optical system 2 therein.

Here, the position of the operation button 3 for the shutter is locatedat the shoulder portion 1 a shown in FIG. 10. However, the informationterminal body 1 may be arranged at any position where the portableinformation terminal can be easily operated.

In these examples, each of the shutter operation button 3 (shutterrelease button) and the scroll button 6 has a button switch structure ofa two-step pressing type. When each button is pressed in the first step,like a conventional camera, the camera function unit is activated to setthe device in a photographing preparation stage. When the button ispressed in the second step, the shutter is released.

In this case, in the state in FIG. 10A (folded state), when the shutteroperation button 3 or the scroll button 6 is pressed down by one step,as shown in FIG. 12, a control circuit 11 controls a lens drive unit 12to adjust a focal point and an exposure of the photographing opticalsystem 2 (optical lens system), and the control circuit 11 controls animage signal processing circuit 13 and a photographing circuit 14 toperform such an adjustment that a proper image can be photographed andcompletes preparation for photographing.

When the shutter operation button 3 or the scroll button 6 is presseddown by two steps, the signal is input to the control circuit 11, andthe shutter (not shown) of the photographing optical system 2 isreleased. Image information focused by the photographing circuit 14 isconverted into digital image data by the image signal processing circuit13 to be stored in a memory 15.

In this case, the control circuit 11 is connected to a main circuit ofthe portable information terminal. Digital image data stored in thememory 15 is transferred to the main circuit through the control circuit11. In this case, the image of a subject is displayed on the displayunit 1 b in place of a viewfinder.

Here, Images are displayed on the display unit 1 b as a finder, and thedisplay unit 1 c is caused to face the subject. The same image isdisplayed on the display unit 1 c, so that an image (so-called cameraangle) which is a subject can be viewed from the subject side. In thiscase, a horizontally inverted image (for example, this is obtained byoperating a line memory as so-called First in last out) of thephotographed image may be displayed on the display unit Ic facing thesubject side. For this reason, the portable information terminal mayhave a selectable and switchable configuration (not shown) such asswitching means for a normal image such that an inverted image isdisplayed through image inversion means 16.

In this example, the scroll button 6 is designed to be used in not onlya shutter operation function (press down) but also a screen scrolloperation or a menu selection operation which is an original function.For this reason, the scroll button 6 is connected to the control circuit11 and also connected to the main circuit of the portable informationterminal. In the portable information terminal, in order to make itpossible to also set the function when the scroll button 6 is verticallypressed down in a function except for the shutter operation function, ascroll button control circuit 17 which can perform an operation such asa function mode switching operation may be arranged. However, when thefunction when the scroll button is vertically pressed down is set inonly the shutter operation function, the scroll button control circuit17 may be omitted.

The portable information terminal can achieve the function of atelevision telephone or the like which is the original function. Forexample, in the folded state shown in FIG. 10A, only a reception state(which can also be actively turned off by the switching operation) and acamera function are set. The function of the information terminal is setsuch that a reception signal of the information terminal can be notifiedby generating a predetermined sound, and the shutter operation of thecamera function unit is performed by a pressing operation of the shutteroperation button 3. In this case, the display unit 1 b is used as afinder.

As shown in FIG. 10B, in a developed state of the cases 1X and 1Y (forexample, a mode turnover switch function for converting the mode from acamera function mode to an information terminal function mode isachieved), functions (switching function to a transmission/receptionstate, function for turning on the display units 1 b and 1 c, and thelike) of the information terminal are set.

Here, for example, a function switch such as a keyboard display isdisplayed on a part of the display unit 1 b, while the scroll button 6is operated to make a call.

In this state, the transmission and reception of sound can be realized,and the camera function unit is operated to continuously orintermittently photograph the image of a user herself/himself throughthe photographing optical system 2. For example, an image is displayedon a part of the display unit 1 b, and an image signal is digitized andthen transmitted to a person on the other end of line, or radiocommunication channel. An image of the person on the other end can alsobe displayed on the display unit 1 c.

In a communication process, on the demand from the calling side orcalled side, the camera function is achieved for a subject on the otherside, a desired photographing operation is performed by using thephotographing optical system 2, and the image can also be immediatelytransmitted from one end to the other end. Such a mode switchingoperation may be performed by a function switch displayed on a part ofthe display unit 1 b or the like. In this case, as shown in FIG. 10A andFIG. 11C, when the display unit 1 c is caused to face a subject toperform a photographing operation, for example, so that the shutter canbe released after a user causes a person (person to be photographed),which is a subject, to check the image. The photographing operation canbe performed at a preferable camera angle, and the image can betransmitted.

In the portable information terminal with camera, when the camerafunction is mainly operated, an image to be photographed can be checked,and an image on which the intention, e.g., a camera angle or the like,of a person to be photographed is reflected can be received.

SECOND EXAMPLE

In this example, a hinge portion 1Z has a structure in which cases 1Xand 1Y are pivoted by parallel shafts if and 1 g (indicated by dottedlines) with respect to a housing 6 equipped with a photographing opticalsystem 2. As the folded states, two states can be selected such thatdisplay units 1 b and 1 c face outside and inside the device.

More specifically, when the portable information terminal is not used,as shown in FIG. 11A, the device is designed such that the display units1 b and 1 c are opposite to each other and are not exposed to theoutside. As shown in FIG. 11B, when the portable information terminal isused as an information terminal, one case 1X is developed at 180° aboutthe parallel shaft 1 f with respect to the other case 1Y (stateindicated by a solid line), or, furthermore, when the cases 1X and 1Yare horizontally drawn as indicated by a straight arrow to rotate thehousing 6 at 90° about an intermediate point between the parallel shafts1 f and 1 g (state indicated by an imaginary line). In this state, as inthe first example, for example, the portable information terminal can beused as a television telephone.

In particular, in this example, when the cases 1× and 1Y are pivoted bythe two parallel shafts 1 f and 1 g the housing 6 is more rotated at 90°(rotated at 180° from the state shown in FIG. 11A) from the state shownin FIG. 11 a through the state shown in FIG. 11 b. In addition, the case1Y is rotated at 180° about the parallel shaft 1 g (i.e., rotated at360° as a whole), so that the display units 1 b and 1 c can be madeopposite to each other as shown in FIG. 11C. Therefore, the image of asubject can be displayed on the display unit 1 b as a viewfinder, andthe same image or a horizontally inverted image can be displayed to beopposite to the display unit 1 b used as a finder on the opposite sidecan be displayed on the display unit 1 c facing the subject. For thisreason, a photographing operation can be performed with an image onwhich a demand, related to a camera angle, of a person to bephotographed is reflected.

In these examples, the vertical press switch function set in the scrollbutton 6 can also be used in a function except for the shutter operationbutton (multiple function) to the taste of a user. In addition, thefollowing method of using the portable information terminal can beachieved. That is, the camera function is operated when the cases aredeveloped at 180°, a live image serving as a viewfinder is displayed onone display unit, and the image which is previously photographed isdisplayed.

1. A portable information terminal which comprises: a camera unit; ashutter button for said camera; a viewfinder of which optical axis isparallel to that of lens of said camera; and a display unit fordisplaying information from transmission channels or image taken in bysaid camera, wherein said lens and said viewfinder on the front side ofsaid portable information terminal are directed to a subject and saiddisplay unit is placed on the rear side.
 2. The portable informationterminal according to claim 1, wherein: said viewfinder is retractable;and said viewfinder is positioned at an upper corner of the informationterminal, while said shutter button is positioned at the another uppercorner.
 3. A portable information terminal which comprises: a cameraunit; a housing for said camera; and a pair of flat cases which pivotsthrough a hinge, wherein: each of said cases is equipped with a displayunit for displaying information from transmission channels or imagetaken in by said camera; said hinge is equipped with said housing; anoptical axis of lens of said camera is perpendicular to an axis of saidhinge; and said hinge has a structure in which said cases are pivoted bytwo shafts parallel to the axis of said housing; and said display unitsface inside said information terminal body in a folded state and theyface outside said information terminal in an unfolded state.
 4. Theportable information terminal according to claim 3, wherein one of saiddisplay units faces a subject and displays a mirror image of an image astaken in by said camera.
 5. A portable information terminal according toclaim 3, wherein said display units are positioned such that the casesare opposite to each other when said display units are folded, whilethey face the same side when said display units are unfolded at 180°. 6.The portable information terminal according to claim 3, wherein saidhousing is rotated by 360° so as to locate said display units inside oroutside said information terminal in a folded state, while said housingis rotated so as to locate said display units on the same side in anunfolded state.